slip39: follow-ups

- fix kivy wizard restore-from-seed
- qt seed dialog: disable "next share" if current share is invalid
- fix tests: file paths should not depend on $PWD (working dir)

electrum/gui/kivy/uix/dialogs/installwizard.py

@@ -989,7 +989,8 @@ class RestoreSeedDialog(WizardDialog):
             tis.focus = False
 
     def get_params(self, b):
-        return (self.get_text(), self.is_bip39, self.is_ext)
+        seed_type = 'bip39' if self.is_bip39 else 'electrum'
+        return (self.get_text(), seed_type, self.is_ext)
 
 
 class ConfirmSeedDialog(RestoreSeedDialog):

electrum/gui/qt/seed_dialog.py

@@ -302,7 +302,12 @@ class SeedLayout(QVBoxLayout):
         self.prev_share_btn.show()
         self.next_share_btn.show()
         self.prev_share_btn.setEnabled(self.slip39_mnemonic_index != 0)
-        self.next_share_btn.setEnabled(self.slip39_mnemonic_index < len(self.slip39_mnemonics) - 1 or (bool(self.seed_e.text().strip()) and not finished))
+        self.next_share_btn.setEnabled(
+            # already pressed "prev" and undoing that:
+            self.slip39_mnemonic_index < len(self.slip39_mnemonics) - 1
+            # finished entering latest share and starting new one:
+            or (bool(self.seed_e.text().strip()) and not self.slip39_current_mnemonic_invalid and not finished)
+        )
 
     def on_prev_share(self):
         if not self.slip39_mnemonics[self.slip39_mnemonic_index]: